Safety-glass rack



R. D. R SBCLJLL May 2, 1939.

SAFETY-GLASS RACK Original Filed Oct. 9, 1957 4 Sheets-Sheet l /NVE/VTORRD. EUJJELL. Sc ULI..

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R. D. R SCULL.

SAFETY-GLASS RACK Originalv Filed Oct. 9, 1957 4 Sheets-Sheet 2 u/Ee May2, 1939 R. D. R. scum. 2,156,876

SAFETY-GLASS RACK Original Filed Cot. 9, 1937 4 Sheets-Sheet 3 x DI EC16 1? 2a 2.33.' -T-- 10 LO' 13. ,(0

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May 2, 1939- R. D. R. SCULL. 2,156,876

SAFETY-GLASS RACK Original Filed OC'L. 9, 1937 4 Sheets-Sheet 4 W 6fief-2 Patented May 2, 1939 UNITED NSTATES PATENT OFFICE SAFETY-GLASSRACK Application October 9, 1937, Serial No. 168.263 Renewed March 14,1939 2 Claims.

The invention relates to racks for safety glass. After safety glassemploying cellulose acetate or cellulose nitrate is composited, it iscustomary, in fluid pressing operations, to stack the plates upon racksand lower the racks into an autoclave.

The present invention has for its object the provision of an improvedrack for supporting the glass sheets in carrying" out this operation, orany similar operation, such as acid grooving, in

which it is desirable to hold a stack of glass sheets securely in aninclined position for shifting about. A further object is the provisionof cheap, simple means adapted to clamp stacks of varying quantity ininclined or upright position which is applicable and releasable in aminimum of time and which may be used to advantage with plates of allsizes. Certain embodiments of the invention are illustrated in theaccompanying drawings, wherein:

Figure 1 is a plan view of a loaded rack. Fig. 2 is a section on theline II-II of Fig. 1. Fig. 3 is a partial section similar to Fig. 2, buton a larger scale. Figs. 4 and 5 are detail sections on the lines IV-IVand V-V of Fig. 3, and Figs. 6

25 and 7 are detail views showing a modified form of clamping means,Fig. 6 being a side elevation and Fig. 'I' a front elevation partly insection.

The base of the rack is made up of the annular angle 1a, the crossstiffening channels 8, 8 and 9,

30 and the parallel bars III, I0, etc., the channels and bars beingwelded or bolted at their ends to the angle 1a so as to provide a rigidstructure of skeleton form. The bars I0, I0, I0 a'ct as the sup-` portsfor the glass plates II which form a stack 35 thereon and to reduce thedanger of chipping where the glass engages the bars, such bars areprovided with a lead sheathing I2 (Fig. 5).

At the ends of the channel 9 are welded a pair oi.' upright strips I3,I3 which are tied together 40 by the lead sheathed bar members Il and-I5 (Fig. 3) which act as supports `for the pack of sheets II, whichrest on the bars I0 and are inclined somewhat to the perpendicular, asindicated in the drawings. Stop members IE (Fig. 45 3) carried by thebars and provided with lead sheathing I1 act as positioning means forthe lower edges of the glass sheets. Two other uprights I3, I0 (Fig. 1)similar to the strips I3, I3 are providedA at the ends of the channels8, B. 50 'I'he upper ends of all of the uprights are provided withopenings I9 (Fig. 3) and in transporting the rack by means of anoverhead crane, three of such openings are utilized to receive the hookson the overhead crane tackle. The rack 35 is also provided with anannular guard band 2I spaced above the base and welded or bolted to theuprights I3, I3 and I8, I8.

The clamping means for the stacks of glass sheets, which may be placedon both sides of the bar members I4 and I5, each include a shoe 22formed of a pair of plates 23. 23 secured together by cotters 24, 24 and25. The cotter 25 acts as a pivot for an upright arm 25 carrying at itsupper end a block 21 adapted to engage the face of the outer plate ofthe pack. The shoe will ride freely on the bar I0 in moving the assemblyto the left (Fig. 4) to bring it to clamping position. Pressure to theright applied at the upper end of the arm 26, however, will cause a.clamping action at the shoe preventing its movement to the right. 'I'hislocking action is due to the corner 28 of the arm engaging the top ofthe bar III as the arm swings on its pivot 25 in a clockwise direction.'I'he device, therefore, automatically locks in the position to which itis moved on the -bar I0. To release the clamp, the shoe itself isgrasped and pulled to the right, a slight pressure being at the sametime applied to the left at the upper end of the bar 25.

In order to adopt the device to plates of varying width, the mounting ofthe block 21 is made adjustable longitudinally of the bar 26. Themounting consists of a U-strap 29 (Fig. 4) whose -sides are clampedagainst the sides of the bar 26 by a bolt 30 provided with a wing nut3|, the ends of the strap being secured to the block 21 by the cotter32. In order to space the plates II at their upper edges, lead wirespacers 33 are provided, as indicated in Fig. 3. Two clamping devicesare ordinarily used with a pack of sheets, but it will be understoodthat the number may be varied depending on the size of the sheets andthat any of the bars I0 may be utilized to carry the shoes.

Figs. 6 and 'I illustrate a modified means for clamping the glasssheets. In this case the shoe 3l and arm 36 are formed in one piece fromspring wire, and the glass engaging member 36 of wood or the like isslidably mounted on the arm, so that it may be adjusted to suitrequirements. The functioning and operation of the device is similar tothat o! Figs. 1 to 5, the shoe locking against movement to the right inany position to which it may be adjusted on the arm.

What I claim is:

1. In combination in a glass rack, a skeleton base including parallelbars of rectangular cross section for supporting the lower edges of apack of glass plates, upright supporting means carried by the base andlying thereabove for engaging the side face ot one of the plates of thestack for maintaining the stack in upright position inclined somewhatfrom the perpendicular, a shoe slidably mounted on one of the bars andcomprising a pair of parallel side plates, a pivot pin between theplates above the bar, and a pair of spaced releasable tie memberssecuring the plates together beneath the bar, and a clamping arm on saidpivot pin provided with means on its upper portion for engaging theplates of the stack on the side thereof remote from the supporting meansand provided at its lower end to the rear of said pivot with a toeportion positioned to enga-ge the top ofthe bar and clamp the shoeagainst movement on the application of pressure to the upper portion ofthe arm tending to move it away from the pack.

2. In combination in a glass rack, a skeleton base including parallelbars of rectangular cross section for supporting the lower edges of apack of glass plates, upright supporting means carried by the base andlying thereabove for engaging the side face of one of the plates of thestack for maintaining the stack in upright position inclined somewhatfrom the perpendicular, a shoe slidably mounted on one of the bars andcomprising a pair of parallel side plates, a pivot pin mountedreleasably in the plates above the bar, and a pair of spaced tie memberssecuring' the plates together beneath the bar, and Aa clamping arm onsaid pivot pin provided with means on its upper portion for engaging theplates of the stack on the side thereof remote from the supporting meansand provided at its lower end to the rear of said pivot with a toeportion positioned to engage the top of the bar and clamp the shoeagainst movement on the application of pressure to the upper portion ofthe arm tending to move it away from the pack.

R. D. RUSSELL SCULL.

